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NEET UG Botany MCQ-91

Question No:1

Chromosome morphology can be best studied during

(A) Interphase and prophase
(B) Prophase and Metaphase
(C) Metaphase and Anaphase
(D) naphase and Telophase

Question No:2

The ratio of centromeres, kinetochores, DNA molecules in a metaphase chromosome

(A) 1 : 2 : 2
(B) 1 : 2 : 1
(C) 2 : 2 : 2
(D) 1 : 1 : 2

Question No:3

If a diploid chromosomal number of plant “A” is doubled for once gives the haploid chromosomal number of plant B and haploid chromosome number of plant ‘C’ is equalent to the diploid chromosomal number of plant “D”. Identify the correct sequence of plant names

(A) Oryza saliva, Nicotiana tabaccum, Zea mays, Saccharum officinarum
(B) Pisum sativum, Zea mays, oryza sativa, Allium cepa
(C) Saccharum officinarum, Gossypium hirsutum, Oryza sativa, Nicotiana tabaccum
(D) Zea mays, Saccharum officinarum, Nicotiana tabaccum, Oryza sativa

Question No:4

Find out the correct sequence in decreasing order of chromosome number of the following
(A) Egg cell of Zea mays
(B) Microspore of Oryza sativa
(C) Synergid of Allium cepa
(D) Secondary nucleus of Pisum sativum

(A) DBAC
(B) DABC
(C) BDAC
(D) CADB

Question No:5

The amino acid ‘Arginine’ is rich in

(A) H2A,H2B
(B) H3,H4
(C) H1
(D) H1,H2A

Question No:6

The amino acid ‘Lysine’s is rich in

(A) H2B,H3
(B) H2A,H2B
(C) H3, H4
(D) H2A,H1

Question No:7

The ratio of H1and H3 proteins in chromatin is

(A) 1 : 2
(B) 2 : 1
(C) 1 : 1
(D) 1 : 4

Question No:8

(A).-Larger cells are more efficient.
(R): Surface to volume ratio is more in large cells.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:9

(A).’Plasma lemma foldings in bacteria are called mesosomes.
(R):Plasma lemma foldings also occur in fungi.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:10

(A).-Membrane transport occurs through the carrier proteins.
(R): The transport by carrier proteins is always passive.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:11

(A).-Nature of lipids present in the outer and inner side of the lipid layer of fluid matrix is same.
(R):Oligosaccharides are attached to outer lipid layer as well as inner lipid layer in cell membrane.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:12

(A).-Cell membranes show fluidity.
(R):Fluidity of cell membrane is due to presence of proteins.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:13

(A).’There is no repair mechanism in the biomembranes.
(R): Biomembranes are permeable.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:14

(A): Primary cell wall is first formed true wall layer of the cell wall.
(R): Some cells possess only primary wall in the cell wall.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:15

(A): Leucoplasts perform photosynthesis.
(R):Leucoplasts consists photosynthetic pigments.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:16

(A): In prokaryotes one end of chromosome fuses with other end to form circular chromosome.
(R):Histones are absent in prokaryotic chromosome.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:17

(A): Super helix around nucleosome is formed by double helical DNA.
(R):In a nucleosome the core is wrapped by two turns of ssDNA.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:18

(A): All secondary constrictions are stainable.
(R): Plasmosomes are produced by secondary constrictions of the chromosomes.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:19

(A).-Presence of ribosomes is a must in all living cells.
(R): Ribosomes are the only organelles concerned with protein synthesis and proteins are the chief organic component of protoplasm.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.

Question No:20

(A): Chloroplasts and mitochondria contain their own genetic material.
(R): They are considered as semiconservative cell organelles.

(A) Both ( A ) and (R) are true and (R) is the correct explanation of ( A )
(B) Both (A) and (R) are true and (R) is not the correct explanation of (A)
(C) (A) is true but (R) is false.
(D) Both (A) are (R) wrong.